More than 50 countries have committed to protecting at least 30 percent of the planet's land and ocean areas to promote biodiversity.
Global leaders discussed measures to preserve the approximately one million species of plants and animals that are on the verge of extinction at the One Planet Summit on Monday.
The summit was hosted by French President Emmanuel Macron. Some leaders, including British Prime Minister Boris Johnson and German Chancellor Angela Merkel, attended online.
The leaders announced that countries including France and Japan will aim to reach the goal by 2030.
They hope an agreement can be reached on the goal at a United Nations conference to be held later this year in China.
Currently, 15 percent of land and 7 percent of the ocean are protected. Officials say increasing the area will reduce carbon dioxide emissions and also lead to creating jobs.
Japan's Environment Minister Koizumi Shinjiro spoke in a video message in a related meeting. He said Japan is prepared to work with other countries to establish an ambitious and realistic goal for the post-2020 global biodiversity framework.