  First-ascent red giants with strong and very strong Li lines have just been
discovered in globular clusters. Using the stellar internal prompt 7Li
enrichment - mass loss scenario, we explore the possibility of 7Li enrichment
in the interstellar matter of the globular cluster M3 produced by these Li-rich
giants. We found that enrichment as large as 70% or more compared to the
initial 7Li content of M3 can be obtained during the entire life of this
cluster. However, due to the several crossings of M3 into the Galactic plane,
the new 7Li will be very probably removed by ram pressure into the disk.
Globular clusters appear then as possible new sources of 7Li in the galactic
disk. It is also suggested that the known Na/Al variations in stars of globular
clusters could be somehow related to the 7Li variations and that the cool
bottom mixing mechanism acting in the case of 7Li could also play a role in the
case of Na and Al surface enrichments.
