The introduction of chemical fertilisers and chemical pesticides resulted in an increase in production in the early years, but by the 1990s and early 2000s, yields had begun to stagnate.
The Greenpeace Google Search will also return results form http://archive.greenpeace.org - Greenpeace’s archive of web content dating back to 1994, along with content from those few Greenpeace websites not shared on this.