Recursos renovables y no renovables - Documental HOME (Recopilación)

Summary

The documentary presents Earth’s resources as a legacy that humans are consuming and altering at an accelerating rate. It contrasts finite resources, such as fossil fuels and minerals, with renewable energy and ecosystems that can be protected and used more sustainably.

Scientific concepts and environmental changes

• Earth’s conditions for life: The narration says life began almost 4 billion years ago and humans appeared about 200,000 years ago. Earth’s distance from the Sun has allowed water to remain liquid, supporting life.
• Minerals and metals: The film describes minerals and metals as ancient “stardust” and connects elements such as iron, carbon, copper, and sulfur with Earth’s colors.
• Fossil fuels: Coal, gas, and oil are presented as energy derived from ancient plant matter that captured sunlight. Their extraction and use have powered industrial development, but the film warns that cheap oil will not last and that fossil-fuel reserves are finite.
• Resource consumption: The film claims that 20% of the world’s population consumes 80% of its resources. It also warns that mineral extraction is accelerating and that continued exploitation could deplete many reserves.
• Oceans and fisheries: Reported annual fish catches rose from 18 million tons in 1950 to 100 million tons. The documentary links this growth and the expansion of factory ships to depleted fish stocks, including declines experienced by traditional fishing communities in Dakar.
• Water and wetlands: Desert communities rely on wells, sometimes drawing on ancient underground “fossil water.” Wetlands help filter and purify water, but the film says half of the world’s marshes had been drained during the preceding century.
• Deforestation: Rainforest loss has accelerated since the 1960s. The narration estimates that 13 million hectares disappear each year, converted to timber and smoke.
• Energy alternatives: Examples include geothermal power, hydropower, biogas from human waste, nuclear power, wind, wave, and solar energy. The film notes that nuclear energy is not truly renewable and that the future role of carbon capture—storing emissions underground—remains uncertain.
• Solar energy: The Sun is presented as Earth’s main energy source, supplying in a short time an amount of energy comparable to humanity’s annual consumption. The film argues for developing ways to capture and use it.
• Human and shared resources: Education, research, innovation, and solidarity are described as resources that can support change. Antarctica is presented as protected for peace and science under a treaty signed by 49 states.

Approaches and examples highlighted

• Reduce consumption and make more responsible purchasing choices.
• Support agriculture that can feed people without diverting food toward meat production.
• Use sustainable fishing practices that protect marine ecosystems.
• Develop homes and neighborhoods that produce their own energy, as illustrated by Freiburg’s eco-neighborhood.
• Expand renewable energy through geothermal, wind, wave, solar, and other locally appropriate sources.
• Protect forests, wetlands, rivers, lakes, glaciers, and biodiversity.
• Share knowledge and resources, and support initiatives intended to improve the lives of people in poverty.

The film’s central message is that solutions already exist, but wider adoption depends on moderation, innovation, cooperation, and collective action.

Researchers and sources featured

No researchers or formal scientific sources are named in the subtitles. Organizations and initiatives mentioned include NGOs, an unnamed microfinance bank in Bangladesh, and the Antarctic treaty signed by 49 states. Places and projects cited include Iceland’s geothermal energy, China’s Three Gorges Dam, and Freiburg’s eco-neighborhood.