How much more lands need to be protected in the U.S?

Factful math: Grade 4th-6th

Math skills: Percentage

Related Environmental issues: Biodiversity

The United States tries to protect 30% of U.S. lands and 30% of its ocean to protect wildlife by 2030.

Only 12% of lands and 23% of the ocean are protected in the U.S. The area of U.S. lands is 3.8 million mi2. How much more lands need to be protected by 2030?


ANSWER 

3.8 x 0.3 – 3.8 x 0.12 = 1.14 – 0.456

1.14 – 0.456 = 0.684 million mi2 = 684 thousand mi2 

Or 3.8 x (0.3 – 0.12) = 0.684 million mi2 = 684 thousand mi2 

 


FACTFUL ENVIRONMENTAL MATH PROBLEMS (2020)

ABOUT THIS BOOK

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

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Published: March 26, 2020

Price: $6.25

How much CO2 do we need to reduce by 2030 to achieve net zero by 2050?

Factful math: Grade 4th-6th

Math skills: Percent change

Related Environmental issues: Climate change

To keep global warming to no more than 1.5°C, we need to be net zero emissions by 2050.

To achieve net zero by 2050, how much CO2 do we need to reduce by 2030?

A) 40% B) 60%


ANSWER A

[Percent Change] (34-21)/34×100=38.2…=about 40%

Source: IEA, Net Zero by 2050.

 


FACTFUL ENVIRONMENTAL MATH PROBLEMS (2020)

ABOUT THIS BOOK

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

Screen Shot 2020-04-02 at 10.20.25 AM
Screen Shot 2020-04-02 at 10.31.32 AM
Screen Shot 2020-04-02 at 10.31.38 AM
unknown-1

Published: March 26, 2020

Price: $6.25