diff --git a/SOURCES.md b/SOURCES.md
index 97987cd..41f6049 100644
--- a/SOURCES.md
+++ b/SOURCES.md
@@ -75,6 +75,10 @@ Football match outcomes across multiple divisions from 2013 to 2017. This datase
 
 Generated using `/scripts/github.py`.
 
+## `global-temp.csv`
+
+Combined Land-Surface Air and Sea-Surface Water Temperature Anomalies (Land-Ocean Temperature Index, L-OTI), 1880-2023. Source: NASA's Goddard Institute for Space Studies https://data.giss.nasa.gov/gistemp/
+
 ## `population_engineers_hurricanes.csv`
 
 Data about engineers from https://www.bls.gov/oes/tables.htm. Hurricane data from http://www.nhc.noaa.gov/paststate.shtml. Income data from https://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=ACS_07_3YR_S1901&prodType=table.
diff --git a/data/global-temp.csv b/data/global-temp.csv
new file mode 100644
index 0000000..01a4f05
--- /dev/null
+++ b/data/global-temp.csv
@@ -0,0 +1,145 @@
+year,temp
+1880,-0.17
+1881,-0.09
+1882,-0.11
+1883,-0.17
+1884,-0.28
+1885,-0.33
+1886,-0.31
+1887,-0.36
+1888,-0.17
+1889,-0.1
+1890,-0.35
+1891,-0.22
+1892,-0.27
+1893,-0.31
+1894,-0.31
+1895,-0.23
+1896,-0.11
+1897,-0.11
+1898,-0.27
+1899,-0.17
+1900,-0.08
+1901,-0.15
+1902,-0.28
+1903,-0.37
+1904,-0.47
+1905,-0.26
+1906,-0.22
+1907,-0.39
+1908,-0.43
+1909,-0.48
+1910,-0.44
+1911,-0.44
+1912,-0.37
+1913,-0.34
+1914,-0.15
+1915,-0.14
+1916,-0.36
+1917,-0.46
+1918,-0.29
+1919,-0.27
+1920,-0.27
+1921,-0.19
+1922,-0.28
+1923,-0.26
+1924,-0.27
+1925,-0.22
+1926,-0.11
+1927,-0.22
+1928,-0.2
+1929,-0.36
+1930,-0.16
+1931,-0.09
+1932,-0.16
+1933,-0.29
+1934,-0.12
+1935,-0.2
+1936,-0.15
+1937,-0.03
+1938,0
+1939,-0.02
+1940,0.12
+1941,0.18
+1942,0.06
+1943,0.09
+1944,0.2
+1945,0.09
+1946,-0.07
+1947,-0.03
+1948,-0.11
+1949,-0.11
+1950,-0.17
+1951,-0.07
+1952,0.01
+1953,0.08
+1954,-0.13
+1955,-0.14
+1956,-0.19
+1957,0.05
+1958,0.06
+1959,0.03
+1960,-0.03
+1961,0.06
+1962,0.03
+1963,0.05
+1964,-0.2
+1965,-0.11
+1966,-0.06
+1967,-0.02
+1968,-0.08
+1969,0.05
+1970,0.03
+1971,-0.08
+1972,0.01
+1973,0.16
+1974,-0.07
+1975,-0.01
+1976,-0.1
+1977,0.18
+1978,0.07
+1979,0.16
+1980,0.26
+1981,0.32
+1982,0.14
+1983,0.31
+1984,0.16
+1985,0.12
+1986,0.18
+1987,0.32
+1988,0.39
+1989,0.27
+1990,0.45
+1991,0.41
+1992,0.22
+1993,0.23
+1994,0.31
+1995,0.45
+1996,0.33
+1997,0.46
+1998,0.61
+1999,0.38
+2000,0.39
+2001,0.54
+2002,0.63
+2003,0.62
+2004,0.53
+2005,0.68
+2006,0.64
+2007,0.66
+2008,0.54
+2009,0.66
+2010,0.72
+2011,0.61
+2012,0.65
+2013,0.68
+2014,0.74
+2015,0.9
+2016,1.01
+2017,0.92
+2018,0.85
+2019,0.98
+2020,1.01
+2021,0.85
+2022,0.89
+2023,1.17