Which of these is safe to clear?
purism@librem-5:~$ sudo du -h --max-depth=3 / | grep G
2.2G /home/purism/.local
3.9G /home/purism/Downloads
8.6G /home/purism
8.6G /home
1.5M /usr/include/GL
112K /usr/include/EGL
332K /usr/include/GLES3
100K /usr/include/GLES
280K /usr/include/GLES2
56K /usr/lib/GraphicsMagick-1.4
1.1G /usr/lib/aarch64-linux-gnu
1.7G /usr/lib
92K /usr/share/GConf
20K /usr/share/GraphicsMagick-1.4
1.4G /usr/share
3.3G /usr
du: cannot access '/run/user/1000/doc': Permission denied
du: cannot access '/run/user/1000/gvfs': Permission denied
du: cannot read directory '/proc/14656/task/14656/net': Invalid argument
du: cannot read directory '/proc/14656/net': Invalid argument
du: cannot access '/proc/18414/task/18434': No such file or directory
du: cannot access '/proc/18453/task/18453/fd/3': No such file or directory
du: cannot access '/proc/18453/task/18453/fdinfo/3': No such file or directory
du: cannot access '/proc/18453/fd/4': No such file or directory
du: cannot access '/proc/18453/fdinfo/4': No such file or directory
9.5G /var/lib/flatpak
6.0G /var/lib/waydroid
du: cannot access '/var/lib/lxcfs/cgroup': Input/output error
16G /var/lib
4.0K /var/tmp/flatpak-cache-ZQFG11
4.0K /var/tmp/flatpak-cache-4VG871
4.0K /var/tmp/flatpak-cache-GZIY41
57M /var/tmp/flatpak-cache-YG3VJ1
8.0K /var/tmp/systemd-private-baa6d4dd84c7439bb9917e07e6aba207-systemd-timesyncd.service-WsGPni
4.0K /var/tmp/flatpak-cache-CTLG81
8.0K /var/tmp/systemd-private-baa6d4dd84c7439bb9917e07e6aba207-upower.service-GIMGMh
1.3G /var/tmp
17G /var
29G /