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World Summit 2002 (Johannesburg) and the 2010 Biodiversity Pledge

Biology · Biodiversity and Conservation · NEET

The World Summit on Sustainable Development was held in 2002 at Johannesburg, South Africa. Here 190 countries pledged their commitment to achieve, by the year 2010, a significant reduction in the current rate of biodiversity loss at global, regional and local levels. Memory hook: "Jo-2-nnesburg" = 2002 place, and its target year was 2010, one-line before the last NCERT line of the chapter.
Global Biodiversity Agreements Timeline1992Rio Earth Summit(CBD)2002Johannesburg Summit190 countries pledge2010Target year toreduce loss rateConserve biodiversityFollow-up pledge
Timeline of global biodiversity agreements: Rio 1992 (Convention on Biological Diversity) led to the follow-up Johannesburg 2002 summit, where 190 countries pledged to reduce the rate of biodiversity loss by the year 2010.

Your doubts, answered

Where and in which year was the World Summit on Sustainable Development held?

It was held in 2002 at Johannesburg, South Africa. NCERT calls it the 'World Summit on Sustainable Development'. Remember the pair: 2002 = Johannesburg. Do not confuse it with Rio de Janeiro, which was 1992.

What did the 190 countries actually pledge in 2002?

The 190 countries pledged their commitment to achieve, by 2010, a significant reduction in the current rate of biodiversity loss at global, regional and local levels. The key point is the TARGET YEAR 2010, not 2002. 2002 is when the pledge was made, 2010 is when the reduction was to be achieved.

How is the Johannesburg 2002 summit linked to the Rio 1992 summit?

NCERT says the Johannesburg 2002 summit was a 'follow-up' to the historic Convention on Biological Diversity (the Earth Summit) held in Rio de Janeiro in 1992. Rio 1992 first called all nations to conserve biodiversity; Johannesburg 2002 added a time-bound pledge to reduce the rate of biodiversity loss by 2010.

Was the 2002 pledge to STOP biodiversity loss or just REDUCE its rate?

It was to achieve a significant REDUCTION in the current RATE of biodiversity loss, not to stop loss completely. NEET options often swap 'reduce the rate of loss' with 'stop all loss' or 'increase biodiversity'. Only the NCERT wording is correct.

Why does NCERT stress that biodiversity conservation is a global responsibility?

Because 'biodiversity knows no political boundaries', so its conservation is a collective responsibility of all nations. This idea leads directly into both the Rio 1992 and Johannesburg 2002 global agreements in the NCERT text.

⚠️ The NEET trap
✗ The World Summit on Sustainable Development (Johannesburg, 2002) is where nations pledged to reduce biodiversity loss BY 2002.
✓ The pledge was MADE in 2002 (Johannesburg), but the TARGET was to reduce the rate of biodiversity loss BY 2010. Two different years: 2002 = event, 2010 = target.
🧠 NEET loves swapping the event year (2002) with the target year (2010). Also swapping Johannesburg (2002) with Rio (1992).

Solved Biodiversity and Conservation NEET PYQs

Try the real previous-year questions from this chapter — each with the answer and a full solution.

See all 32 Biodiversity and Conservation NEET PYQs ›
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Frequently asked

In which city and country was the 2002 World Summit held?

Johannesburg, South Africa. NCERT: 'the World Summit on Sustainable Development held in 2002 in Johannesburg, South Africa'.

By which year did countries pledge to reduce biodiversity loss?

By 2010. The 190 countries pledged in 2002 to achieve a significant reduction in the current rate of biodiversity loss by 2010.

How many countries took the pledge?

190 countries pledged their commitment at the Johannesburg 2002 summit.

Is the Johannesburg Summit the same as the Convention on Biological Diversity?

No. The Convention on Biological Diversity was the Rio Earth Summit of 1992. Johannesburg 2002 was a follow-up summit that added the time-bound 2010 pledge.

Why is this important for NEET?

NEET repeatedly tests exact years, places and numbers from this last paragraph of the Biodiversity and Conservation chapter. Knowing 1992 Rio, 2002 Johannesburg, 190 countries and 2010 target prevents easy trap questions.

Related concepts:
Rio Earth Summit 1992 and the Convention on Biological DiversityKey Scientists to Remember (May, Humboldt, Ehrlich, Tilman, Myers, Wilson)How Do We Conserve Biodiversity? In-situ vs Ex-situWhy Should We Conserve Biodiversity? Three ArgumentsLoss of Biodiversity: Meaning and Mass Extinctions
Practise Biology for NEET:
Biology MCQs (free, chapter-wise)Biodiversity and Conservation PYQs