A trial to quantify CO2 emission by utilizing our belonging materials has been conducted. For the Polymer electrode membrane Fuel Cell (PEFC) system, the reduction of more than 23% CO2 emission was measured under a practical operation in a family of Okayama prefecture. The statistical data of...

Renewable energy is a promising alternative to fossil fuel-based energy, but its development can require a complex set of environmental tradeoffs. A recent increase in solar energy systems, especially large, centralized installations, underscores the urgency of understanding their environmental...

The success of climate and natural resource protection depends amongst others on the expansion of renewable energies. The policy paper describes the central results of the RESCUE study as well as the challenges and steps required to expand renewable energies in order to achieve greenhouse gas...

The sustainable energy transition taking place in the 21st century requires a major revamping of the energy sector. Improvements are required not only in terms of the resources and technologies used for power generation but also in the transmission and distribution system. Distributed generation...

Combined heat and power (CHP) production in buildings is one of the mitigation options available for achieving a considerable decrease in GHG emissions. Micro-CHP (mCHP) fuel cells are capable of cogenerating electricity and heat very efficiently on a decentralised basis. Although they offer...

Ratifying the Paris Climate Change Agreement of 2015, which is the new framework for global environmental measures for change after 2020 onward, Japan is proposing to reduce its greenhouse gas emissions by 26% by 2030 from 2013 levels. To achieve this target, it is indispensable to transcend the...

Unlike oil and coal, which are compressed forms of energy, renewable energy requires unusually large land areas. This article calculates the consequences of a switch to hydrogen-cell vehicles powered by electricity from wind turbines. It then re-does the calculation for three other green energy...