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To limit global warming to less than 1.5 °C global greenhouse gas emissions needs to be net-zero by 2050, or by 2070 with a 2 °C target. [271] This requires far-reaching, systemic changes on an unprecedented scale in energy, land, cities, transport, buildings, and industry.
The public substantially underestimates the degree of scientific consensus that humans are causing climate change. [16] Studies from 2019 to 2021 [17] [18] [19] found scientific consensus to range from 98.7–100%.
The German Climate Action Plan 2050 (German: Klimaschutzplan 2050) is a climate protection policy document approved by the German government on 14 November 2016. [1] The plan outlines measures by which Germany can meet its various national greenhouse gas emissions reduction goals through to 2050 (see table) and service its international commitments under the 2016 Paris Climate Agreement.
The IPCC Sixth Assessment Report defines a tipping point as a "critical threshold beyond which a system reorganizes, often abruptly and/or irreversibly". [14] It can be brought about by a small disturbance causing a disproportionately large change in the system.
TCRE is modeled using climate models that simulate carbon emissions by increasing CO 2 emissions by 1% per year from pre-industrial levels until the concentration of CO 2 in the atmosphere is doubled (2 x CO 2) or quadrupled (4 x CO 2).
Four climate change scenarios, based on 2015 data. [5] [6] Left: emissions pathways following the scenarios of (1) no policy, (2) current policy, (3) meeting the governments’ announcements with constant country decarbonization rates past 2030, and (4) meeting the governments’ announcements with higher rates of decarbonization past 2030.
The costs of climate change are estimated to amount to €9.5 billion a year in 2050 (2% of Belgian GDP), mainly due to extreme heat, drought and flooding, while economics gains due to milder winters amount to approximately €3 billion a year (0.65% of GDP). [5] The country has committed to net zero by 2050. [6]
The United Nations Framework Convention on Climate Change (UNFCCC) is the UN process for negotiating an agreement to limit dangerous climate change.It is an international treaty among countries to combat "dangerous human interference with the climate system".