I literally had this exact exchange with someone last year, when they tried to cast doubt on global warming by comparing it to the ozone. Another person did the same , using acid rain, and I pointed out that the northeast sued the shit out of the Midwest until they cut that shit with the coal fire power plants.

I went with ProtonMail because it is based in a non-five eyes country… Plus it was launched by CERN scientists - major geek coolness factor. Recently upgraded to the basic paid tier.