Keep The Earth Green Essay

Going Green Essay

612 Words3 Pages

Going Green

Lately the phrase “going green” has become a part of everyday discussion and debate. People are being told to turn off the lights, buy energy-saving appliances, and drive less. What people are not being told is why, specifically. Global warming is the increase of the Earth’s average temperature. Greenhouse gases are the cause of this problem; carbon dioxide, nitrogen oxide and methane (1). Normally the earth’s atmosphere lets these gases in but does not release all of it. The excess gases keep the plant warm enough to sustain life. However over time, the atmosphere has sustained damage from chemicals, like the ones released in fossil fuels, and now the planet is heating up too much too fast. Even just a few degrees…show more content…

Most hybrids run use internal combustion engines and electrical motors (2). Internal combustion engines require fuel to create a combustion reaction which powers the engine. An electric motor uses electrical energy to produce mechanical energy which can then run the motor. An on-board rechargeable energy storage system (RESS) stores enough energy, which is also rechargeable, to run the electric motor (2). To lower fuel consumption, the RESS regenerates power, or energy, through regenerative breaking or sometimes through the combustion engine. Regenerative breaking uses some of the energy produced by the car when accelerating and stores it. This is why hybrid cars cannot compete in the market for speed. In more modern models, a mechanism allows for energy to be taken from the combustion engine to charge the cars battery or electrical motor (2). In the sense of “going green”, hybrids reduce idle emissions by shutting off the ICE during idle times, like stop lights and traffic, and then restarting it when the car needs to move. A smaller and more efficient engine also cuts back on power compared to large engines where all the parts may not be used, but need to be powered, thus reducing emissions (2). Other benefits from HEVs are noise-level reduction and air pollution.

The goal of hybrid manufactures is to run vehicles without the use of fuel. However, this is a new market and the

Show More

...About Yamuna. But not just Yamuna • Every river, every lake, every water body getting polluted. Full of our sewage. • We take water, return sewage. • 80% of water leaves as sewage • Cities are growing, need more water, discharge more pollution. • Dirty water means ill health: biggest cause of children’s death. Be angry. Not acceptable. ------------------------------------------------- 22 Km stretch in Delhi Contributes 70 per cent of the total pollution load of the river Funds spent, programmes implemented • By 2006 17 sewage treatment plants built; 10 common effluent plants built; 30 km of trunk sewers repairs (out of 130 km) Slums removed from riverfront ------------------------------------------------- Low-cost toilets built Money Spent -Not about pollution. It is about sewage • We discuss pollution because it is modern and somehow touchable. • We do not discuss human excreta and its disposal. That is an untouchable subject. • Flush and forget mindset. • Drains will carry it. Somebody will treat it. Somebody will build sewage treatment plant. Clean it. Dispose it. • Don’t care. Yamuna is polluted not because of us ------------------------------------------------- But it is about us: our water; our sewage Current system: bring water (from distance); treat, pump, pipe to home, take sewage, pump, pipe, treat and dispose…river will be clean • Should work. But: a....

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *