Alternative energy sources to fossil fuels
Renewable energy uses natural resources such as sunlight, wind, rain, tides and the heat of the earth, which were constantly renewed. Worldwide about 13% of primary energy comes from renewable energy sources where we get most of the biomass, providing 2-3% of the total energy produced. Other technologies such as geothermal, wind, solar and energy of the tides occur on the whole less than 1% of energy demand worldwide. The potential of renewable energy is enormous. Renewable energies offer three main advantages in comparison with fossil fuels. The first is that they are running out (oil is limited, the sun is not). The second is that they are much less polluting. Third, the ease of relocation. The latter means that any oil is not low at home, but anyone could have a solar panel or a wind turbine on the roof.
One current campaign of Greenpeace
Protect Bluefin Tuna. They have been doing a campaign to promote the protection of the bluefin tuna, but they don’t have success, because in the last ICCAT tuna summit that closes in Paris recently there no was protecting the bluefin: The quota that governments have given on bluefin tuna is deemed by ICCAT’s own scientists to provide only a 70% chance of recovery.
Other environmental organisations
There are a lot of them: Intergovernmental organizations, Government organizations and Private Organizations (Environmental NGOs)
I think one of the most known is WWF: The World Wide Fund for Nature (WWF) is an international non-governmental organization working on issues regarding the conservation, research and restoration of the environment, formerly named the World Wildlife Fund, which remains its official name in Canada and the United States. It is the world's largest independent conservation organization with over 5 million supporters worldwide, working in more than 90 countries, supporting around 1300 conservation and environmental projects around the world. It is a charity, with approximately 60% of its funding coming from voluntary donations by private individuals. 45% of the fund's income comes from the Netherlands, the United Kingdom and the United States.
The group says its mission is "to halt and reverse the destruction of our environment". Currently, much of its work focuses on the conservation of three biomes that contain most of the world's biodiversity: forests, freshwater ecosystems, and oceans and coasts. Among other issues, it is also concerned with endangered species, pollution and climate change.