Express News Service: “The 21st century has come with a message of global warming. Rivers are drying up, use of chemical fertilisers has degraded the soil, while population and pollution are also increasing,” said noted environmentalist Sunder Lal Bahuguna while speaking at the Press Club here on Sunday. Asserting on the importance of planting trees, the activist said global warming is a serious threat and needs to be dealt with. Asked on his current projects, the activist added, “We are concerting …