Biomethane is gaining in profile as a clean solution to powering fleets of cars at a local level as well as a practical response to the need to better manage organic waste from food and farm production and to cut greenhouse gas emissions from vehicles
Discussions sparked by plans for banks in the EU to hold less capital against green lending have advanced thinking about how monetary authorities and regulators can support green investment, even if the plans themselves have received a mixed reception
Building solar and wind projects without subsidies is seen by many as the solution to the energy transition. But falling costs can create their own problems, especially without the right regulation and continuing financial support for fossil fuels
The advantages for big companies of buying their electricity directly from wind and solar generators at a fixed long-term price is bringing what could become a major new flow of capital into the renewable energy market, but outdated legislation remains a barrier
The ups and downs in demand for electricity have long made the flexible operation of power systems a must, so increasing that flexibility to also accommodate variations in supply from renewables is not that big a challenge. Having a clear definition of the term can only help the energy transition
If the global marine transportation sector were a country, it would be ranked sixth in terms of CO2 emissions. A number of progressive leaders in the industry are starting to explore alternative ways to propel their ships, but more investment is needed.
Special report - Electricity Storage part 1/5: Belief about the need for electricity storage is no substitute for hard evidence. Countries furthest ahead with transitioning to renewable energy are doing so without incurring the cost of storage. As a foundation for decision making, belief is a dangerous quicksand. Investors beware.
Special report - Electricity Storage part 3/5: By relieving grid bottlenecks of surplus supply and providing bursts of power when needed, storage can add sufficient value to find routes to profitability, but they are limited
Special report - Electricity Storage part 4/5: No means of affordably storing large volumes of electricity in all geographies exists, but a robust grid, connected over a wide area, can deliver green energy reliability
Special report - Electricity Storage part 5/5: The uptake of renewable energy does not increase the need for storage capacity, but stored power can help grid operators flexibly operate power systems, provided it can pay its way
Theme on Energy Efficiency part 4/5: Companies are not investing enough in energy efficiency in order to reap its benefits. This is the economic oddity of energy efficiency, says Brian Motherway, head of energy efficiency at International Energy Agency