Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
These USGS maps show the increase in imidacloprid pesticide (one pesticide correlated with collapse in bee colonies) on agricultural land from 1992 to 2014 in the conterminous United States.
