Mistletoe the leaves and berries of the plant, with teas prepared from the plant being particularly dangerous. While adults may suffer little effect, these are more pronounced in small children and in animals. There are 1500 species of Mistletoe, varying widely in toxicity; the European Mistletoe ("Viscum Album") is more toxic than the American Mistletoe ("Phoradendron serotinum"), though concerns regarding toxicity are more prevalent in the US. Mistletoe has been used historically in medicine for its supposed value in treating arthritis, high blood pressure, epilepsy and infertility: Conversely, it can cause vasoconstriction and bradycardia, and is also used as an illegal
Plant-for-the-Planet 1 million trees in each of their own countries. Plant-for-the-Planet promotes the view that each tree is a contribution towards environmental and climate protection. It also suggests that each tree planting is an action for social justice. The organisation says that it is most often the developing countries that suffer the most from the effects of climate change, despite the fact that they have most often done the least to cause it. Plant-for-the-Planet says it considers each tree to also be a symbol for climate justice. By the start of 2011, there were children participating in more than 93 countries.