By reducing waste, by reusing and recycling, you will help to prevent the need to clear land, and will assist in decreasing pollution levels around the globe. Every effort you make, no matter how small it may seem, makes a difference.
Small differences accumulate into significant effects.
Pick garbage up off the ground even if you didn't leave it there. Reduce the amount of toxic chemicals entering waterways, drinking water supplies, fisheries and other foods by not dumping chemicals down the drain. Reduce the amount of water you use and use it wisely. Take shorter showers. Don't leave the tap running when you clean your teeth or wash dishes.