This study evaluates the life-cycle greenhouse gas (GHG) contributions of different HDV vehicle technologies and fuel pathways in India. Examining three representative HDVs—a 12-tonne rigid truck, a 55-tonne
The rule of unintended consequences threatens to strike again. Some researchers have suggested that injecting sulfur compounds into the atmosphere might help ease global warming by increasing clouds and haze that would reflect sunlight. After all, they reason, when volcanoes spew lots of sulfur, months or more of cooling often follows. But a new study warns that injecting enough sulfur to reduce warming would wipe out the Arctic ozone layer and delay recovery of the Antarctic ozone hole by as much as 70 years.
Atmospheric measurements show that the carbon dioxide (CO2) concentration in the atmosphere is currently '385 parts per million (ppm) and rising fast. But this value is a global average that tells us nothing about the regional distribution of greenhouse gas emissions. As the world embraces myriad mitigation strategies, it must gauge which strategies work and which do not. Gaining such understanding will require a greenhouse gas monitoring system with enough accuracy and precision to quantify objectively the progress in reducing emissions.
The Arctic and northern subpolar regions are critical for climate change. Ice-albedo feedback amplifies warming in the Arctic, and fluctuations of regional fresh water inflow to the Arctic Ocean modulate the deep ocean circulation and thus exert a strong global influence. By comparing observations to simulations from 22 coupled climate models, the researchers find influence from anthropogenic greenhouse gases and sulfate aerosols in the space-time pattern of precipitation change over high latitude land areas during the second half of the 20th century.
Japan and the European Union failed to agree on Wednesday on a "mid-term' target for cutting greenhouse gas emissions, but will go into the G8 talks this summer with a closely matched position that contrasts sharply with that of the US. The governments agreed that national "mid-term' emission cutting targets should be set, but Japan was unwilling to specify a year. The EU has agreed to cut its emissions by 20 per cent by 2020, and had urged Japan to agree the same. Both sides agree that emissions should be halved by 2050, in line with scientific warnings on climate change.
Japan and the European Union agreed Wednesday to step up cooperation in the fight against global warming, calling for a "highly ambitious and binding international approach" to cut greenhouse gas emissions. European Commission President Jose Manuel Barroso and Slovenian Prime Minister Janez Jansa, who now serves as president-in-office of the European Council, met Prime Minister Yasuo Fukuda at his official residence in Tokyo in an annual meeting between top EU and Japanese leaders.
Major greenhouse gases in the air are accumulating faster than in the past, despite efforts to curtail their growth. Carbon dioxide concentration in the air increased by 2.4 parts per million last year, the National Oceanic and Atmospheric Administration reported Wednesday, and methane concentrations also rose rapidly. Concern has grown in recent years about these gases, with most atmospheric scientists concerned that the increasing accumulation is causing the earth's temperature to rise, potentially disrupting climate and changing patterns of rainfall, drought and other storms.
RECENTLY, an advertisement showed how super-models are trying to promote an eco-friendly lifestyle through their outfits made with materials that are less polluting, less harmful to the environment and the earth, which, in other words, is called a green method of living. Comparing black, a trendy colour for evening parties, with this green way of resource utilisation is not only interesting but also reflects the fact that global environmental issues -- climate change to be precise -- have caught the attention of everyone. The problem
Satellite data show that changes in the sun are contributing to global warming but to a smaller extent than human activity, a space scientist at the Naval Research Laboratory in Washington told a group of petroleum geologists Wednesday. "The sun is playing a role that you can detect, but it's not the dominant role," Judith Lean told a crowded session at the 2008 convention of the American Association of Petroleum Geologists in San Antonio.
The current and imminent adverse environment having social and economic impact of Green House Gas (GHG) emissions is a global phenomenal. The governments around the world are increasingly developing or are implementing policies regarding reduction of GHG emission to address the challenge. Because of current and expected regulatory constraints, firms and individuals around the world are taking steps to reduce their GHGs emissions.
The Maldives, worried about rising seas from climate change, wants steeper cuts in global greenhouse gas emissions but is unwilling to curb its tourism industry, which is reliant on polluting international flights. President Maumoon Abdul Gayoom, in Singapore promoting his book "Paradise Drowning" at an environmental business summit, said cutting back on tourism was not the answer even though the country's survival was more important than development.
