The protocol was driven by the scientific consensus that human activities, particularly the burning of fossil fuels, were accelerating the greenhouse effect and causing global temperature rises.
Unlike previous voluntary agreements, the Kyoto Protocol established legally binding targets for emissions reductions for developed countries, known as Annex I parties.
To enter into force, the protocol required ratification by at least 55 countries, including enough industrialized nations to account for at least 55% of the total emissions produced by that group in 1990.
The Cap-and-Trade system was introduced as a market-based approach where countries or companies are given a limit on emissions and can trade 'carbon credits' if they emit less than their quota.
The Clean Development Mechanism (CDM) allowed developed nations to earn emission reduction credits by investing in green energy or conservation projects in developing countries.
Joint Implementation enabled industrialized countries to meet their targets by investing in emission-reduction projects in other developed countries, particularly those with 'economies in transition'.
It is vital to distinguish the Kyoto Protocol from the Montreal Protocol, which specifically targets ozone-depleting substances like CFCs rather than greenhouse gases.
| Feature | Kyoto Protocol | Paris Agreement |
|---|---|---|
| Scope | Primarily Developed Nations | All Nations (Developed & Developing) |
| Targets | Legally Binding | Nationally Determined Contributions (NDCs) |
| Goal | Specific GHG % Reductions | Limit warming to below 2°C |
While Kyoto focused on top-down mandates for a specific group of countries, the subsequent Paris Agreement shifted to a bottom-up approach involving global participation.
When asked about international climate policy, always identify the Kyoto Protocol as the first major treaty to set binding targets, even if its overall impact was limited.
Remember the 'Six Gases' list; examiners often include a non-GHG like or as a distractor in multiple-choice questions.
Be prepared to discuss the role of the United States; the U.S. signed the treaty but never ratified it, which is a frequent point of analysis regarding the treaty's effectiveness.
Always check if a question is asking about ozone depletion (Montreal) or climate change (Kyoto/Paris) to avoid the most common categorical error in environmental science exams.
