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What is the greenhouse effect?
Why is it said that the earth is warming up?
Has this warming up started already?
Is climate change something different from the hole in the ozone layer?
Is man the only cause of climate change?
Are weather and climate the same thing?
Greenhouse gases : what are they ?
What gases are greenhouse gases? How much do they contribute to the greenhouse effect?
Is it legitimate to say that carbon dioxide is a poison?
What are the aerosols? - what role do clouds play?
Are we really sure that it's man that modified the atmosphere?
Trying to guess the future
A climate change, is it just a change of the average temperature?
What is a climate model ? What are the models' first conclusions?
Should we trust climate models?
How many extra degrees can we get?
How do the present temperatures compare to the past ones?
Will temperatures and precipitations evolve the same way everywhere?
What is an emission scenario? Is it important for the future?
Will climate change get rapidely to a halt if we quickly decrease the emissions?
Do we know if there is a "threshold of danger"?
Will extreme phenomena of all kind increase in the future?
Will marine currents change?
Are the ecosystems at risk?
Will we turn the ocean into an acid lake?
Will we all be sick?
Will oceans submerge everything?
Will the "hole in the ozone layer" increase?
Will men be able to stay calm?
Won't certain regions of the world be spared by climate change?
Can't we expect that "something" will slow down the process?
Can the whole process get totally out of control?
Should we fear methane hydrates?
Tobacco and climate change : a little comparison
The carbon cycle
Won't the carbon sinks absorb the extra CO2?
Can't we just grow forests to compensate for our CO2 emissions?
Who are "the scientists"?
Since when do "scientists know" for climate change?
What is the IPCC?
Should we believe anybody just because he(she) writes in the paper?
Is the press correctly accounting for the available scientific information?
Greenhouse gases and us
How do greenhouse gas emissions presently evolve?
What is our present energy consumption like?
Do I emit greenhouse gases through my daily acts?
How much greenhouse gases in our plate?
How much greenhouse gases in our wastebin?
How much greenhouse gases does the author's family emit?
Won't a soon to come fossil fuel shortage solve the problem for us?
Shouldn't we wait until we are totally sure of what's going on before we do anything?
At what level must we stabilize atmospheric CO2?
What amount of CO2 should each of us be allowed to emit?
Is leaving one's car in the garage sufficient to suppress the CO2 emissions in excess?
Won't "the technique" save us?
Can't we put the carbon dioxide in a big hole and just forget it?
What collective actions could be done?
What are the international negociations aiming at?
Are the Americans the kings of evil?
Who should reduce first?
Doing one's good deed regarding climate change : what is the impact of individual actions?
I run a business : can I "do something"?
An example of emission calculation : how much carbon equivalent at Jancovici and co?
Is there an ideal world ?
Are there "CO2 free" energies?
What can be expected from the electric cars?
Could we live just like today with only renewable energies?
What would an "energetically vertuous" world look like?
Does economic growth "create" greenhouse effect?
Does it make sense to give a price to climate change consequences?
What price increases would follow a carbon tax?
What are the tradable permits?
What is Kaya's equation?
How much extra greenhouse gases emissions if we build a new airport near Paris ?
How much extra greenhouse gases emissions if we replace nuclear power plants by gas turbines?
Oil, gas, coal, and friends
Oil and co
How do oil, gas and coal form ?
What is an oil reserve?
Using oil ? But what for?
How come it's been 40 years that we have 40 years of oil?
Getting oil out of the ground, a piece of cake?
What is non conventional oil?
Have you ever seen an oil peak somewhere?
Gas and co
What is a gas reserve ?
Using gas ? But what for?
Is gas a miracle energy?
WHat is non conventional gas?
What is producing gas about?
Have you seen any gas peak somewhere?
Coal and co
What is a coal reserve?
What does producing coal look like?
Using coal? But what for?
Is it dangerous to use coal?
What is "liquid coal"?
A coal production peak, have you seen any?
Oil and economy
Buying fuels : who gets what?
How did the price evolve since 1860?
Is the price of oil driving the price of energy at a whole?
Is the price of oil driving the economy?
Trying to foresee the future
When does the world oil production peak?
When does the world gas production peak?
When does the world coal production peak?
How much will oil cost?
All that is radioactive
All that is radioactive
Discussion on a couple of common statements on nuclear energy
A couple of thoughts on phasing out nuclear energy
Did nuclear energy kill renewables?
Should we replace nuclear by gas fired power plants?
What transition are the Germans up to exactely?
Plenty of long series on major countries or zones
Can we save energy, increase jobs and have growth all at the same time?
What is the true cost of electricity?
A couple thoughts on the energy transition
Energy, what is it about exactely?
Could the economy stop growing? (because it lacks energy)
Is hydropower the silver bullet for renewables?
How much of a slave master am I?
Could we totally substitute oil by biofuels?
Let there be taxes !
Do energy savings mostly consist in efficient light bulbs?
Do renewable energies mostly consist of wind power?
Is it easy to store energy?
What role did I play in the french national debate on energy?
Could we live as today with just renewable energy?
What is exactely the share of electricity in France's energy consumption?
What is the "true cost of energy"? (July 2001)
What would an "energetically vertuous" world look like?
Could we produce France's electricity with wind power?
Could we produce France'ss electricity with solar panels?
Could we produce France'ss electricity with biomass?
What can we expect from fuell cells? (january 2001)
How much fossil fuels may we use if we want to stop perturbing the climate?
How fast can we decrease our energy consumption?
Should we encourage the growth of air trafic?
Could we replace all cars by trains?
Is the electric car an ideal solution for tomorrow's mobility?
Doing without car for daily life, is it possible?
Is there an "environmentally friendly" tourism?
What was there in the famous "Report to the Club of Rome"?
Is sustainable development useful?
Is the "polluter payer" principle a real principe?
They are ecologists without knowing it...
Jean-Pierre COFFE and his last book
What value have forecasts?
How much is the planet worth?
Are nature lovers necessarily ecologists?
Could we all eat organic ?
A couple of dead-ends linked to our present "developpement"
Urbanization : a couple of figures on the french situation, and a little prolongation of trends
Energy and climate change : discussing two opposite evolutions (december 2004)
Little address given during the presentation of the movie "The Day After" to the french press (may 2004)
Renovating ancient housing, a widely unknown action possibility against climate change (march 2004)
Discussing a couple of common statements on nuclear energy (january 2003)
Electricity and concurrence : dogma for all thinking ? (november 2002)
A letter published in the reader's section of Le Monde about hydrogen (september 2002)
Are we going towards a climate shock ?
Prayer for a teaching of environment matters at ENA
Energy and choice of life (may 2001)
Tradable permits in transportation (may 2001)
By wishing the withdrawal from nuclear energy, Germany is living in the wrong world
Climate Change 2001, The Scientific Basis
Gaïa : a new look at life on Earth
Democraty in America
State of Fear
The Skeptical Environmentalist
The Wall Street Journal of april 2001
A letter to the president of Arte (june 2003)
Who am I ? > Leisure
In order to keep a clear mind
for my cli
ents....and (just a little) for my personnal pleasure
I spare some time to exercic
e a little
Let's go back to serious
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