Renewable energy sources such as water, solar and wind power together form more or less an inexhaustible source of energy, which technically would be able to meet the energy needs of the entire world. These three sources are found in every country on the planet, albeit to varying degrees. Since the oil crises of the 1970s interest in non-fossil energy sources has increased. In recent years additional incentives have emerged primarily due to rising concerns about not only climate changes but also problems in accessing oil and gas. Renewable energy sources are currently only used for a small portion of the world’s energy consumption, however efforts are being made across the world to develop and improve access to renewable energy. For example, EU’s representatives have agreed that one-fifth of the total EU energy demand in ten years should be powered by renewable energy, compared to less than ten percent today. In addition to improving the environment and guaranteeing supply, ‘green energy’ can also contribute to economic growth.
When it comes to renewable energy, Sweden is at the head of the pack, relying on renewable energy sources for more than half of its energy needs. Sweden invested in water power early. Even a lot of biofuel, primarily from the forest, is used today as a source of energy. The stamp motifs depict wave energy, solar energy, wind energy and bio energy. The 4 stamps and 1 coil stamp are scheduled to be released on March 24, 2011. The Booklet Stamps were designed by Gustav Martensson from photos by Irene Anderson, (solar energy); Lenart Broborn, (Bio energy); Jeff Rotman, (Wave energy) and Matton Images (Wind energy). The coil stamp was designed by Gustav Martensson from a photo by Ingmar Aourell. The booklet stamps have a size of 37.5 X 26.6 mm while the coil stamp has a size of 25 by 32.2 mm. All stamps were printed by the offset method.