Statue of Professor Frans Smuts, Conservationist, Stellenbosch, Western Cape Province, South Africa, Africa

Daintree Naturalist, David Armbrust feeds Macleay's Honeyeater bird, Queensland, Australia

A protest camp against fracking at a farm site at Little Plumpton near Blackpool, Lancashire, UK, where the council for the first time in the UK, has granted planning permission for commercial fracking fro shale gas, by Cuadrilla.

A protest banner against fracking at a farm site at Little Plumpton near Blackpool, Lancashire, UK, where the council for the first time in the UK, has granted planning permission for commercial fracking fro shale gas, by Cuadrilla.

Face of Caucasian woman illuminated by energy efficient light bulb

Man wearing harness climbing tree

Teacher showing recycling symbol to girls in classroom

USA, New Mexico, Hands of boy hugging aspen tree in Santa Fe National Forest

Bare feet of woman standing in lush green grass

Tree hugging business executive

Portrait of young woman holding recycling bin

Close-up of girls (6-7) hands holding globe