It really, truly, doesn’t matter whether it’s a little human carbon emissions driven and a little human noncarbon emissions activity like over use of pesticides. The two interact and act at different scales. Climate change from carbon and other gases has been accurately predicted to affect the weather trends to this point. The error bars on the future all indicate masses of the earth going under the rising ocean level. That’s locked in regardless of what we do. Imagine what’s locked in if we continue to do nothing. No amount of pesticide is going to lessen or worsen the realization of billions dead.