A World Without TrsHav you vr imagind a world without trs? Try it, and you will s th whol world dry up and look lik a brokn tortois shll. At night, th tmpratur would drop sharply. Living craturs could not run away and it would b as if thy livd in hll. 　

Thr ar som ffctiv stps w can tak now to protct trs. First, strict laws must b nforcd. Scond, th govrnmnt should offr subsidis to popl who plant trs. Most important of all, vry citizn must dvlop an awarnss of th importanc of trs and rmmbr: "no trs mans no living things."