Ars Technica: As global temperatures increase, sea levels are predicted to rise, more severe weather events could occur, and agriculture and animal habitats may be disrupted, all of which will cause problems for humans. In an effort to limit world temperature rise to no more than 2 °C by 2020, the International Energy Agency (IEA) has proposed a four-step plan of action: accelerate the phasing out of fossil fuels, limit the construction and use of the least efficient coal plants, capture more of the methane generated before it enters the atmosphere, and improve the efficiency of buildings, vehicles, and industrial processes. Despite the reasonableness of the proposal, similar efforts in the past have been met by opposition from countries and companies because of the initial costs and potential loss of income from not developing their fossil-fuel reserves.