Chance encounter

Root out erosion

Icy moves

Illegal immigrants

Face-lift

Getting fighter-friendly

A relic from the past

Never say die

Parting ways

Raining destruction

Starting or stopping

Concrete concerns

Greasy gains

Smog busters

Wolves feel the crunch

Alaska's predator control programmes undermine the region's ecological health

Opium of the masses

Poppy and coca cultivation is destroying the ecology of central Colombia

Wealth in waste

Sewage can be used to make the desert green

Unknowing vectors

Humans may be transmitting new and dangerous viruses to Antarctica

Seas of hunger

Dams prevent nutrients in rivers from reaching the oceans

Staying Cool

Chemical engineers say algal colonies could be the solution to global warming

Paint it safe

Gauging emissions

Everybody must get stones

Magnetic Cleanup

Salmon vs salmon

Escaping farmed salmon are interfering with native Pacific salmon off the coast of Canada