Demand for palm oil - a substance found in many everyday products - is threatening some of the world's most endangered species.
The rapid expansion of palm oil plantations in Indonesia has already led to the clearance of large tracts of rainforest, driving out animals like tigers, orangutans and Sumatran elephants.
Campaigners fear a new law may soon be passed which would open up another area the size of Yorkshire to the diggers.
ITV News' Science Editor Lawrence McGinty reports:
More top news
Heterosexual couple Rebecca Steinfeld and Charles Keidan challenged the law and lost - but the ruling shows the matter is far from resolved.
Mild but cloudy
On his 93rd birthday, Robert Mugabe insisted he has no plans to stand down as Zimbabwe's leader and vowed to stand again in the election.