The purpose of the study is to - based on field measurements - determine the average annual leakage rate of HFC-134a from MACs in the European Union of a "second generation"1 air conditioner. From November 2002, to January 2003 300 measurements of HFC-134a leakage were carried out on air conditioners of cars up to seven years age. The measurements were carried out on vehicles of all EU relevant makes at 19 garages in Germany (Osnabrück), Portugal (Rio Maior) and Sweden (Helsingborg) reflecting different climatic conditions.

The European Union Emissions Trading Scheme ('EU ETS') began on 1 January 2005. The implementation of the EU ETS has raised interest in market-based approaches to achieving environmental and related public policy goals in the EU, particularly those related to promotion of renewable energy and energy efficiency. Indeed, national and regional markets in tradable green certificates ('TGCs') and (to a lesser extent) tradable white certificates ('TWCs') already exist. Green certificate schemes are established or proposed in a number of Member States (e.g., Belgium, the Czech Republic, Denmark, France, Italy, the Netherlands, Sweden and the UK) and form part of a growing portfolio of measures to achieve the renewable targets outlined in Directive 2001/77/EC. White certificate schemes are considerably less widespread, although schemes have been established in Italy and the UK and further activity may be stimulated by the Commission proposal on energy services (COM(2003)739). Both the renewables Directive and the energy services proposal envisage the possible evolution and harmonisation of these instruments into EU-wide certificate schemes. This study has two major objectives: -1. Analyse interactions among EU ETS and green/white certificate markets. The first major objective is to describe the interactions between green and white certificate programmes and the EU …

This white paper describes the state of digital collections resulting from NSF funded research in biodiversity, ecology, environmental health, environmental education, and environmental resource management.

New data from tree rings from 500 sites around the world are now available from NOAA. These data are important because they provide climate scientists and resource managers with records of past climatic variability extending back thousands of years.

This document provides a summary of a study by NOAA researchers and National Institute for Space Research in the Netherlands. According to the study, one of the atmosphere's most potent greenhouse gases, methane, may now have leveled off. Scientists aren't sure yet if this "leveling off" is just a temporary pause in two centuries of increase or a new state of equilibrium.

This report reviews several issues relating to alternative fuels and vehicles, mainly to combat dependence on petroleum imports and reduce greenhouse gas emissions. The report discusses the advantages and drawbacks of various alternative fuels and vehicles, as well as related legislation.

In December 2007, the parties to the United Nations Framework Convention on Climate Change (UNFCCC) held their 13th annual meeting in Bali, Indonesia, and began the process of working toward an agreement/treaty that would succeed the Kyoto Protocol to the UNFCCC when it expires in 2012. The Protocol includes a mandate for a reduction of greenhouse gas (GHG) emissions by 30 developed/industrialized nations to an average of some 5% below their 1990 levels over the commitment period 2008-2012. The broad array of these issues, briefly discussed in this report, has been described by some as comprising perhaps the most complex negotiations ever undertaken internationally.

At least one recent report and numerous news articles suggest that carbon dioxide (CO2) emissions are rising more rapidly than expected. While CO2 emissions associated with human activities continue to rise -- and may be worthy of alarm because of their influence on climate change -- any short-term comparisons between actual emissions and the Intergovernmental Panel on Climate Change (IPCC) scenarios miss the mark. This report analyzes this issue and the issues associated with IPCC scenarios and trajectories. It also describes the importance of monitoring CO2 emissions and analyzing the factors and forces behind increasing CO2 emissions.