Which of the following resources have been the main contributors to Russia wealth in recent years?

The main contributors to Russia's wealth in recent years include:

1. Oil and Gas Industry: Russia possesses vast reserves of oil and natural gas, making it one of the largest producers and exporters of these resources in the world. Revenue from oil and gas exports has been a significant contributor to Russia's wealth.

2. Metals and Minerals: Russia is rich in various metals and minerals, including iron ore, nickel, aluminum, copper, gold, and diamonds. Mining and exporting these resources have played a significant role in the country's economic growth.

3. Arms Sales: Russia has a robust defense industry and is one of the world's largest arms exporters. Sales of military equipment to countries across the world have been a significant source of wealth for the country.

4. Agriculture: Russia has vast fertile lands, and agriculture plays a crucial role in its economy. Export of crops such as wheat, barley, corn, and sunflower oil has contributed to the country's overall wealth.

5. Manufacturing: Russia has a diverse manufacturing sector, including machinery, automobiles, aerospace, chemicals, and electronics. Export of manufactured goods has been a significant contributor to the country's wealth.

It is important to note that the contribution of these resources to Russia's wealth can vary over time due to various factors like global market conditions, technological advancements, political factors, and economic policies.