Unlike land plants, photosynthesis in many aquatic plants relies on bicarbonate in addition to CO2 to compensate for the low availability of CO2 in water.

When will the next eruption take place? Examination of samples from Indonesia's Mount Merapi show that the explosivity of stratovolcanoes rises when mineral-rich gases seal the pores and microcracks in the uppermost layers of stone.

Toxic substances such as pesticides can cause effects on sensitive individuals in concentrations up to ten thousand times lower than previously assumed.

The world’s tropical forests store huge quantities of carbon in their biomass and thus constitute an important carbon sink. However, current estimates of the amount of carbon dioxide stored in tropical forests of the Amazon vary largely.

Team finds stronger tornadoes in clouds with larger peak areas.

Wetlands are dynamic in nature, growing and shrinking within and between years in ways far less predictable than croplands, forests, or established urban areas.

A new instrument with its eye on the Moon is taking off aboard a high-altitude NASA plane to measure the Moon’s brightness and eventually help Earth observing sensors make more accurate measurements.

There is no running water, no sewage system, and no garbage disposal, but La Rinconada has one resource worth its weight.

Rapid urban development has led to deteriorating water quality and toxic algae blooms.

Monitoring sources of freshwater around the world in real-time is becoming more important as human impacts and climate change increase the threats to freshwater.