Climate Change impact on Hydrological Cycle and Tipping Points

What is the current global mean surface temperature rise mentioned in the video?

• 0.5 degrees Celsius

• 1.2 degrees Celsius

• 2.0 degrees Celsius

• 3.0 degrees Celsius

Answer explanation

The video states that the current global mean surface temperature rise is 1.2 degrees Celsius, which reflects the ongoing impact of climate change. This makes 1.2 degrees Celsius the correct choice.

What significant climate agreement was signed ten years ago according to the video?

• Kyoto Protocol

• Paris Climate Agreement

• Montreal Protocol

• Rio Declaration

Answer explanation

The significant climate agreement signed ten years ago is the Paris Climate Agreement, which aims to combat climate change by limiting global warming and reducing greenhouse gas emissions.

What is the projected temperature increase by the year 2100 if current trends continue?

• 1 degree Celsius

• 2 degrees Celsius

• 3 degrees Celsius

• 4 degrees Celsius

Answer explanation

Current climate models project a temperature increase of approximately 3 degrees Celsius by 2100 if current trends in greenhouse gas emissions continue. This aligns with the scientific consensus on climate change impacts.

What is one of the major concerns mentioned regarding the acceleration of warming over the past 50 years?

• 0.10 degrees Celsius per decade

• 0.18 degrees Celsius per decade

• 0.26 degrees Celsius per decade

• 0.30 degrees Celsius per decade

Answer explanation

The major concern regarding the acceleration of warming is that it has increased by 0.18 degrees Celsius per decade over the past 50 years, indicating a significant and alarming trend in climate change.

What environmental issue is highlighted as contributing to the instability of the planet?

• Overconsumption of fresh water

• Deforestation

• Air pollution

• Soil erosion

Answer explanation

Overconsumption of fresh water leads to depletion of this vital resource, causing ecological imbalances and contributing to instability in ecosystems and human societies, making it a critical environmental issue.

What is the estimated economic cost of climate change in the US for the year 2023?

• 50 billion US dollars

• 100 billion US dollars

• 150 billion US dollars

• 200 billion US dollars

Answer explanation

The estimated economic cost of climate change in the US for 2023 is projected to be around 100 billion US dollars, reflecting the increasing impact of climate-related events and policies.

By 2050, what percentage of GDP loss is expected if the current climate path is followed?

• 10%

• 15%

• 18%

• 20%

Answer explanation

Following the current climate path, it is projected that the global economy could face an 18% loss in GDP by 2050. This highlights the significant impact of climate change on economic stability.

What is the global mean surface temperature rise currently happening?

• 0.5 degrees Celsius

• 1.2 degrees Celsius

• 2.0 degrees Celsius

• 2.7 degrees Celsius

Answer explanation

The current global mean surface temperature rise is approximately 1.2 degrees Celsius since the late 19th century, primarily due to human activities such as burning fossil fuels and deforestation.

What is the term used to describe the period when Earth's temperature never exceeded two degrees Celsius?

• Ice Age

• Holocene

• Quaternary

• Corridor of Life

Answer explanation

The term 'Corridor of Life' refers to a period when Earth's temperature remained stable and did not exceed two degrees Celsius, supporting diverse ecosystems. The other options do not specifically denote this temperature threshold.

What percentage of carbon dioxide from fossil fuel burning and land system change has been absorbed by nature?

• 31%

• 45%

• 53%

• 60%

Answer explanation

Nature absorbs approximately 53% of carbon dioxide emissions from fossil fuel burning and land use changes, making it a significant player in mitigating climate change.