or simply something to play with. When that happens, it can lead to negative effects for the animals. For example, a bird can use a deflated balloon as a component for its nest. When the eggs hatch, they will get tangled in the balloon and that can lead to death. Anthony Andrady says that releases of latex balloons that descend into the sea pose a serious ingestion and/or entanglement hazard to marine animals because balloons exposed floating in seawater deteriorate much more slowly than those exposed in air. Balloon manufacturers will often state that a latex balloon is perfectly safe to release into the environment as it is made from a natural substance and will biodegrade over time. A latex balloon can take up to a year to degrade if it lands in the sea and during this time it is possible for a marine animal to ingest the balloon and die from slow starvation if its digestive system is blocked. NABAS (National Association of Balloon Artists and Suppliers), an organisation that styles itself "The Balloon and Party Professionals Association" and represents the UK balloon industry, publishes guidelines for people holding balloon releases. some of the leading balloon manufacturers have started to recommend avoiding balloon releasing, instead preferring to tie balloons down with weights in order to prevent them from floating away. These recommendations have also been adopted by some industry professionals working with balloons in the fields of design and entertainment. Makeup Traditionally balloons are manufactured from plastic. With the rise of worldwide awareness for environmental conservation, some balloon manufacturers started making balloons out of biodegradable materials, which are made entirely of natural recyclable rubber trees. These balloons manufacturing processes preserve the natural state of the material in such a way that allows it to degrade relatively quickly. Some of the manufacturers only use rubber trees that are grown in plantations that receive the Rainforest Alliance’s approval, and at which its representatives conduct regular inspections in order to make sure that the farmers meet several criteria set to ascertain that the biological diversity in the area is maintained, and that no worker or natural resource is abused in the material manufacturing process. Another environmental problem with latex balloons is not the effects the balloons have on the environment once they are decomposed, but when they are being made. When latex is being produced, it produces greenhouse gases, such as