Deforestation

Biofuels may create carbon debt, as land cleared for crops releases carbon.

European forests are growing and absorbing more carbon dioxide than expected.

Some fuels from vegetable oil are environmentally better than others.

City birds more adaptable to different environment than rural birds.

Droughts may not hurt Amazon rainforest as much as previously thought.

Only about 10% of animal species are known, scientists estimate.

New projections say climate change and habitat destruction will imperil birds.

Decline in global biodiversity may signal decline in human health.

Tropical rainforests help slow down global warming, while trees in higher latitudes may cause more warming, a new study finds.