They are expensive because they are difficult to grow, hard to find in the wild, in decline because of climate change and habitat loss, and in high demand.
Many researchers have argued that the dinosaurs were already in decline because of climate change.
On average, each protected area in China would experience a decline of suitable climate for 3 4 species by 2080.
It's not perfect, but after living through the decline of oil, climate change and an economic crisis, it still has an impressive health and education system and an ingenious population who cope with adversity.
As a consequence, the projected global pH decline of the climate change experiment does not differ from the projection made with the control experiment.
Beginning approximately 37,000 years ago, the bison began to decline, perhaps because of climate and habitat changes associated with the developing ice age.
Climate scientists have also complained of muzzling by the government, and leaked documents from Environment Canada showed that a drastic decline in coverage of climate change by the Canadian press between 2007 and 2010, due to Environment Canada's own new media policies.
You saw the stats that I put up where internal documents for the federal government lauded the fact that there was an 80% decline in the amount of climate change, Environment Canada, science that's being discussed.
He says, "In Vietnam there's declining coffee production because of climate change.
It is often assumed that timing of migration is synchronized with the phenology of resources [11], resulting in potential mismatches and associated population declines as a result of climate change [54].
