Buying locally-produced fruit and veg, riding bikes or taking the train instead of using private cars, buying carbon offsets and staging carbon-neutral weddings: all are part of the climate-change awareness taking root in many countries.
Individuals keen on reducing their "carbon footprint" -- the dangerous greenhouse gas that each of us emit through our purchases and activities -- can now turn to a multiplying panoply of tools to calculate their pollution, reduce it or compensate for it.
"Our daily habits are responsible for 50 percent of greenhouse gas emissions," says France's Agency for the Environment and Control of Energy (ADEME).
Transport alone causes a quarter of global greenhouse gas emissions, and even though automakers are making efforts to reduce carbon dioxide (CO2) in new vehicles, the "clean car" still does not exist outside the research lab.
On journeys of around 1,000 kilometres (620 miles) in France, an express train emits roughly a quarter less CO2 than an aircraft per passenger, according to ADEME.
A bus emits between 10 and 20 times less CO2 than a car, and both are of course beaten for greenness by walking and cycling if distances permit.
If you have to use a car, keeping your speed down can also help to reduce emissions. Very fast driving can increase a car's CO2 emissions by 40 percent.
Another simple energy-saving method is to climb stairs rather than use electricity-lapping lifts and escalators, a practice actively encouraged in Japan and Belgium for example.