The problem will get better, even if the direct effect of no pesticide home gardens of course is negligible. But it helps change the mindset of people. People

The problem will get better, even if the direct effect of no pesticide home gardens of course is negligible. But it helps change the mindset of people. People who live in garden with a diversity of wildlife, who find joy in the butterflies (and their larvae), who are appalled by the thought of poison their own air, water and soil, soon start to buy organic food and vote for stricter environment protection laws. In addition, while it might not change the world, the amount of pesticides and herbicides used by all the homeowners in a city like LA isn’t insignificant, in particular not for the local wildlife.