Many farmers rely on synthetic pesticides to control crop-damaging insects, with usage in some developed countries reaching several kilograms per hectare annually. These compounds often persist in the environment well beyond their intended purpose, entering food chains, disrupting the natural predator populations that would otherwise help control pests, and contributing to pesticide resistance among the very insects they target. Naturally derived, biodegradable pest-control compounds, which break down quickly and harmlessly in sunlight, offer a safer alternative for both users and ecosystems.

With reference to the above passage, the following assumptions have been made:

1. Synthetic pesticides should never be used under any circumstances in modern agriculture.

2. One aim of sustainable agriculture is to minimise ecological disruption.

3. Naturally derived pesticides are always more effective at controlling pests than synthetic ones.

Which of the assumptions given above is/are correct?