The HDI is a composite statistic of life expectancy, education, and income indices. The Gender inequality index is not a component of the HDI.

According to the 2020 HDI report, Norway has the highest HDI in the world, followed by Switzerland, Singapore, and Australia.

According to the 2020 HDI report, Niger has the lowest HDI in the world, followed by the Central African Republic, Chad, and South Sudan.

The main cause of poverty in developing countries is the lack of economic opportunities, which prevents people from earning a decent living.

Inequality in the world is caused by a combination of factors, including discrimination, unequal access to education, unequal access to healthcare, and other factors.

Discrimination is caused by a combination of factors, including prejudice, stereotypes, institutionalized racism, and other factors.

Environmental degradation is caused by a combination of factors, including deforestation, pollution, climate change, and other factors.

Economic growth is not a challenge to human development, but rather a means to achieve it.

Education, healthcare, and economic growth are all key factors in promoting human development.

Poverty, inequality, and discrimination are all key challenges to achieving the SDGs.

Eradicating poverty, reducing inequality, and ending discrimination are all key targets of the SDGs.

Life expectancy, education index, and gross national income per capita are all key indicators of human development.

Data availability, data quality, and data comparability are all key challenges to measuring human development.

Education, employment opportunities, and political participation are all key factors in promoting gender equality.

Climate change, deforestation, and pollution are all key challenges to achieving environmental sustainability.