A great place to start would be to seriously limit or eliminate pesticides like Roundup. Don't believe the alarmists in Big Ag who will say the world will starve. We overproduce food now, and organic farming techniques, if widely adopted, wouldn't make it impossible to continue to produce enough. The loss of diversity in insects and "weeds" has had a huge impact up the chain.
I once saw a great quote which was, "maybe food is too cheap". This is probably true, we could probably eat better quality, organic food grown in a more diverse way, it would just cost more. On the flip side, it would be more valued so we'd have less waste. I can't imagine the amount of "non-valued" food, fruit vegetables etc which end up in the bin.
If you banned the pesticides, it would do a lot of good, but now consider how many more acres would need to be farmed in order to keep the overall yields the same. How many acres would be cleared that would not otherwise be cleared?
I agree that glyphosate (RoundUp now makes up less than half the market, which is largely Chinese-made and Chinese-consumed now) should probably be far more heavily regulated, but be aware that humans are not going to happily grow less food on the same land when yields drop.
Taste the rainforest.