Author: David Leen

David is a professional manager helping different companies to integrate new techologies into their production process. His mission is to inform owners about new and developing technologies which may reduce expenses and increase income from their companies.

Nature

Diagram comparing renewable and nonrenewable water: the water cycle refills rivers and shallow groundwater, while deep aquifers such as the High Plains aquifer lose water where pumping exceeds natural recharge

November 13, 2026

Is Water a Renewable Resource? Yes, but Not Everywhere

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Water is renewable thanks to the water cycle, but fresh water is only 2.5% of Earth’s water and some aquifers barely refill. See U.S. data and what it means.

Nature

Infographic of environmental issues in Germany: panels for climate and coal, heat and floods, forests and nature, and air and water with key figures on emissions, heat deaths, healthy trees, insect decline and PM2.5 deaths

November 1, 2026

Environmental Issues in Germany: 8 Biggest Problems and What Is Being Done

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The 8 biggest environmental issues in Germany, from slipping climate targets, coal and heat waves to dying forests, insect loss and nitrate, with latest data.

Nature

Infographic of environmental issues in Europe: panels for climate, water and fire, air and nature, and waste with key figures on warming, heat deaths, burned area, PM2.5 deaths and municipal waste

October 31, 2026

Environmental Issues in Europe: 8 Biggest Problems and What Is Being Done

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The 8 biggest environmental issues in Europe, from record heat, floods and wildfires to drought, air pollution and nature loss, with the latest EU data.

Nature

Diagram of the four soil health principles of regenerative agriculture: minimize disturbance, keep the soil covered, maximize biodiversity and keep living roots, above a soil profile

October 30, 2026

What Is Regenerative Agriculture? Principles, Practices and What the Evidence Says

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Regenerative agriculture is farming that aims to rebuild soil health, not just protect it. Learn its principles, practices, benefits, limits and who backs it.

Cars

Bar chart of average hydrogen fuel cost in California per kilogram: $14.95 in 2022, $35.80 in 2024 and $35.47 in 2025, next to a hydrogen pump

October 29, 2026

How Much Does Hydrogen Fuel Cost? Price per Kilogram and per Fill-Up

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Hydrogen fuel costs about $27–$36 per kilogram in the US, so filling a Toyota Mirai runs $150–$200. See price history, cost per mile and why it is so expensive.

Nature

Infographic of environmental issues in Mexico: panels for water, air and land, coasts and wildlife with key figures on drought, subsidence, PM2.5, forest loss and the vaquita

October 28, 2026

Environmental Issues in Mexico: 8 Biggest Problems and What Is Being Done

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The 8 biggest environmental issues in Mexico, from drought and a sinking capital to air pollution, deforestation and the vaquita, with the latest data.

Nature

Infographic of environmental issues in India: panels for air, water and climate with key figures on PM2.5, groundwater, sewage, heat waves and coal power

October 27, 2026

Environmental Issues in India: 8 Biggest Problems and What Is Being Done

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The 8 biggest environmental issues in India, from toxic air and falling groundwater to river pollution, heat waves and coal, with the latest official data.

Nature

Infographic of environmental issues in Brazil: panels for the Amazon, the Cerrado and Pantanal, and cities and rivers with key figures on deforestation, fires, drought, sewage, floods and mining

October 24, 2026

Environmental Issues in Brazil: 7 Biggest Problems and What Is Being Done

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The 7 biggest environmental issues in Brazil, from Amazon and Cerrado deforestation to fires, floods and sewage, with the latest INPE and MapBiomas data.

Nature

Diagram of human-environment interaction in Japan: mountains and forests, rice terraces on a slope, a city on the coastal plain with a seawall, a flood tunnel under the city and an airport on an artificial island

October 23, 2026

Human-Environment Interaction in Japan: How People Depend On, Adapt To and Change the Land

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Human-environment interaction in Japan: how a mountainous, quake-prone country farms, builds and gets energy. 10 examples of dependence, adaptation and change.

Cars

Diagram of a hydrogen fuel cell car showing hydrogen tanks, fuel cell stack, battery, electric motor, air intake and water vapor exhaust

October 19, 2026

How Do Hydrogen Cars Work? A Simple Guide to Fuel Cell Vehicles

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Hydrogen cars make their own electricity on board with a fuel cell. Learn how the parts work together, how refueling works, and which models you can buy.