The first objective is universal to global warming games. The issues surrounding global warming commonly included are carbon dioxide emissions and the emission of other greenhouse gases, the melting of the polar ice caps, sea-level rise, natural disasters and massive changes to lifestyles caused by global warming. Games that do not go beyond the objective of knowledge and familiarity tend to be designed for younger audiences. Games designed for young children often only have the goal to engage the children enough to excite their attention to focus on these basic concepts.