Geoengineering aims to address the effects of global warming by directly manipulating the Earth's climate system, rather than focusing on reducing greenhouse gas emissions or developing renewable energy sources.

Carbon capture and storage (CCS) is a technology that aims to capture carbon dioxide from industrial sources and store it underground. It is not considered a geoengineering technique because it does not directly manipulate the Earth's climate system.

SRM techniques aim to reduce the amount of sunlight reaching the Earth's surface by reflecting it back into space. This can be achieved through various methods, such as injecting aerosols into the stratosphere or deploying reflective materials in space.

SRM techniques have the potential to cause a range of unintended consequences, including increased precipitation, changes in weather patterns, and disruption of the ozone layer. These risks need to be carefully evaluated before any large-scale deployment of SRM techniques.

Weather modification techniques aim to manipulate weather patterns to achieve specific outcomes, such as increasing precipitation in drought-prone areas, reducing the intensity of hurricanes, or preventing hailstorms.

Ocean fertilization involves adding nutrients to the ocean to stimulate the growth of phytoplankton, which can lead to increased fish populations, removal of carbon dioxide from the atmosphere, and production of biofuels.

Ocean fertilization has the potential to disrupt marine ecosystems, release harmful gases, and deplete oxygen in the ocean, leading to negative environmental consequences.

Geoengineering techniques face a range of challenges, including technical feasibility, economic viability, and environmental risks. These challenges need to be carefully addressed before any large-scale deployment of geoengineering techniques.

International cooperation is essential for the governance of geoengineering to ensure equitable access to technologies, minimize risks, and promote responsible research and development.

The UNEA resolution on geoengineering aims to establish a global governance framework to ensure the responsible and ethical development and deployment of geoengineering techniques.

Geoengineering techniques have the potential to provide benefits such as mitigation of climate change impacts, adaptation to climate change, and enhancement of agricultural productivity.

The deployment of geoengineering techniques raises concerns about unintended consequences, high costs, and technical challenges.

The feasibility of a geoengineering technique is determined by a combination of factors, including cost-effectiveness, technical feasibility, and environmental impact.

Public engagement plays a crucial role in the governance of geoengineering to ensure transparency, accountability, informed decision-making, and address ethical and social concerns.

The implementation of geoengineering techniques faces challenges such as lack of international cooperation, insufficient funding, and public acceptance.