Original sentence: , glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors., though it is difficult to connect specific events to global warming.Other effects may include changes in agricultural yields.There may also be changes in the frequency and intensity of extreme weather events.These claims are not well founded: there is no clear trend in solar variation over the past few decades and Earths warming is very likely due to human activity though Solar System Warming sugguests otherwise
Edited sentence: Other effects may include changes in agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors.There may also be changes in the frequency and intensity of extreme weather events, though it is difficult to connect specific events to global warming.These claims are not well founded: there is no clear trend in solar variation over the past few decades and Earths warming is very likely due to human activity