If we're to avert catastrophic climate change the world must quit coal. But the industry and the powerful forces which rely on it won't go down without a fight. Yesterday, in Warsaw, Greenpeace provided them with two reminders of why we all need to quit coal.

Latest updates from the impressive ProtectPlanetOcean web site provide convincing support for Greenpeace's long-held contention that marine reserves provide the best long-term solution to the problems of overfishing and pollution which threaten the world's marine ecosystems. In case you've forgotten marine reserves are protected areas, national parks at sea where no fishing or other extractive industries (such as oil, gas or gravel extraction) are permitted.

The site has pulled together studies of 124 marine reserves around the world - scientific peer-reviewed research published in academic journals - to provide a clear picture of what has happened where reserves have been established.

It's official; mankind is killing off our oceans far faster than previously thought. The first global-scale study of human impacts on marine ecosystems, published today in the flagship US journal Science, reveals a picture of widespread destruction with few if any areas remaining untouched.

The North Sea, once one of the most productive in the world, is now amongst the most degraded. Oil extraction, waste dumping and chemical pollution have all taken their toll, and relentless commercial fishing has pushed some fish stocks - such as cod - to the brink of collapse.

Which is why our ship Arctic Sunrise is once again heading out into the North Sea to campaign for the urgent creation of marine reserves - national parks at sea where marine life can get some respite from commercial exploitation.

Car manufacturers are trying to sabotage a new European climate law that would force them to improve the efficiency of their new vehicles. But there's time to act to make sure that Europe's cars are cleaner and greener in future.