We read each source directly and add no estimates of our own.
Each source publishes on its own schedule, and we check for new data once a day.
Changes on the tiles are worked out by us from the published values.
Brent oil
Most transport still runs on oil, so its price shapes how fast people switch to cleaner travel.
This is the average price for the month. The price at the pump also includes refining, taxes and delivery. The World Bank relies on outside price providers for this series.
Gas in Europe
Gas heats homes and makes electricity, so a high price pushes people to save energy and switch to wind and solar.
The price comes from the Dutch gas market, the main trading place for gas in Europe. Other regions have their own prices, so comparisons are rough. The World Bank relies on outside price providers for this series.
Australian coal
Coal releases the most carbon dioxide per unit of electricity, so cheap coal keeps old power plants running longer.
Australian coal is one of several benchmark prices and says little about coal sold under long contracts elsewhere. The World Bank relies on outside price providers for this series.
The euro and other currencies
Oil and coal are priced mostly in US dollars, so the euro rate changes what Europe pays for the same amount of fuel.
These are reference rates published once on each working day for information, and banks apply their own rates when money is exchanged.
Oil prices since 1960
The long view shows the price shocks of past decades and how countries answered them with fuel saving and new energy sources.
Prices are in the dollars of each year without correction for inflation, so old values look smaller than they were in today's money. The World Bank relies on outside price providers for this series.
Natural gas in three regions
Gas heats homes and makes electricity. Prices differ sharply between regions, and high prices make electricity dearer and push countries toward coal, or toward wind, solar and saving energy.
The three series come from different trading hubs and contracts, so they show the direction of each market and compare only roughly. For all three markets the World Bank relies on outside price providers. The two newest months for Japanese liquefied gas are estimates.
The price of coal from Australia
Coal gives off the most carbon for each unit of electricity. Its price shows how cheap it is to keep coal plants running next to cleaner options.
Australian coal is one of several benchmark prices and says little about coal sold under long contracts elsewhere. The World Bank relies on outside price providers for this series.
Quotes of energy companies
A rising or falling share price reflects how investors see the future of oil, gas, power networks and clean energy, and so which businesses get the money to grow.
Most exchanges delay their prices, and a share price expresses the market's opinion of a company, which says little about its climate record.