Doomsday biologist suddenly spreads confidence – ten successes should encourage

For years she warned of the collapse of the planet. Now a renowned biologist suddenly speaks of hope – and gives ten examples.

For years, she warned against the planet's impending climate collapse. Now, a renowned scientist suddenly speaks of hope – and gives ten examples.For years, she warned against the planet's impending climate collapse. Now, a renowned scientist suddenly speaks of hope – and gives ten examples.Anna-Lena Janzen / t-onlineAn article by US biologist Nancy Knowlton, once known as "Dr. Doom", wants to convey a more optimistic perspective on the climate …