About the Carbon Monitor project, Carbon dioxide (CO2) emissions from the use of fossil fuels and the production of cement are the main driving force of climate change. The combustion of fuels also releases pollutants in the air. Carbon Monitor is an international initiative leveraging the efforts of ten research groups to provide for the first time regularly updated, science-based estimates of daily CO2emissions in different countries. The data reveal the drop and re-growth of CO2emissions during the COVID-19 pandemics. Being. regularly updated, the Carbon Monitor data will allow us to better understand how policy actions and economic shifts, energy prices, vacations, weekends, and weather control the dynamics of CO2emissions.Carbon Monitor data are made freely available to the public with a fair use open data policy. We encourage users to cite the data by https://arxiv.org/abs/2004.13614. Carbon Monitor is a living dataset subject to updates and the values are expected to change, as new data get included. In the process of updating our daily CO2 emission products, errors may be corrected, revisions may be made in the calculation methods, and new information may be used. Data files available for download and graphs are associated to a day of release. In case of questions regarding data and history previous releases, please contact us at firstname.lastname@example.org or email@example.com. All information displayed and provided can be used at the own responsibility of users, and does not engage any responsibility from research institutions supporting Carbon Monitor and partner institutions.