Ключевые слова: action, activism, alternative, billboard, business, change, climate, climate change, co2, co2 footprint, co2 reduction, community, cop25, earth, ecology, economy, emission, emissions, energy, environment, environmental, environmental issues, future, government, green, green energy, green zone, greenhouse, ifema, madrid, madrid fair, millennial, planet, planet earth, politics, protection, protest, renewable, revolution, rights, sign, spain, sustainable development, time to act, timetoact, trade, un, unfccc, urban, warming,