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“Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand” - Albert Einstein[fn][[nid:995]][/fn]

Kandi Mosset is a member of the Mandan, Hidatsa, and Arikara Nations on the Fort Berthold Reservation in North Dakota, USA. She has organized many environmental action projects among Native Americans ranging from recycling programs and community gardens to protests against hydraulic fracking on Native American lands. Watch her moving testimony before the US Congress [fn][[nid:687]][/fn]

Aldo Leopold (1887-1948), (left, with naturalist Olaus Murie) was an American ecologist famous for the ‘land ethic’ he proposed in his book A Sand County Almanac (1949). Leopold believed we must change our characters from “conqueror of the land-community” to “plain member and citizen of it”; only then will we respect all creatures of the natural world as our “fellow members” in a shared community.[fn][[nid:684]][/fn]

Melvin Calvin (1911-1997) was an American chemist whose careful use of the scientific method in laboratory experiments helped him discover facts that led to a new theory explaining photosynthesis--the process by which green plants convert solar energy into chemical energy.[fn][[nid:681]][/fn]