Tyre for a heavy-duty vehicle of construction plant type, comprising: - elastomer compounds derived from non-fossil and/or fossil resources, any elastomer compound having a viscoelastic loss tan(δ) defined as being the ratio of the viscous shear modulus G" to the elastic shear modulus G', these modulus values being measured in accordance with the standard ASTM D 5992-96, at a frequency of 10 Hz for a temperature of 100°C, and any electrically conducting elastomer compound being defined as having an electrical resistivity less than or equal to 1E+06 Ohm centimetres ('Ω.cm), measured in accordance with the standard ASTM-D257; - a tread having two axial end portions or tread wings (27, 28) that are axially separated by a central tread portion; - a crown reinforcement, radially on the inside of the tread, comprising at least one protective reinforcement and a working reinforcement, said reinforcements being formed respectively of protective layers (311, 212) and of working layers (321, 322) containing metal reinforcers coated with an elastomer compound, these layers at their axial ends having a layer of edging compound (35, 37); - a carcass reinforcement, radially on the inside of the crown reinforcement, comprising at least one carcass layer made up of metal reinforcers coated in an electrically conducting coating elastomer compound, said metal reinforcers being substantially mutually parallel and forming, with the circumferential direction (XX') an angle of between 85° and 95°, each carcass layer comprising a main part, connecting two beads to one another and wrapped, within each bead, around a bead wire to form a turn-up; - a carcass-crown coupling layer consisting of electrically conducting elastomer compound and inserted between the carcass reinforcement and the crown reinforcement, axially towards the outside in the shoulder region; - two sidewalls connecting the tread wings (27, 28) to the two beads, said beads comprising a bead chafer layer intended to come into contact with a rim; characterized in that the mass of the elastomer compounds derived from non-fossil resources is greater than or equal to 65% of the total mass of the elastomer compounds contained in the tyre, in that at least 75% of the total mass of the elastomer compounds contained in the tyre is made up of elastomer compounds each of which has a viscoelastic loss tan(δ) less than or equal to 0.065, and an electrical resistivity greater than or equal to 1E+10 'Ω.cm, in that a linking layer, made up of an electrically conducting elastomer compound is inserted radially between the carcass-crown coupling layer and the crown reinforcement, and is in contact at its axially exterior end with the tread wing and at its axially interior end with the carcass layer coating compound, and in that the tread wing, the linking layer, the carcass layer coating compound and the bead chafer layer constitute a conducting preferred pathway for conducting electrical charge between the ground and the rim when the tyre is mounted on its rim and compressed onto the ground. - elastomer compounds derived from non-fossil and/or fossil resources, any elastomer compound having a viscoelastic loss tan(δ) defined as being the ratio of the viscous shear modulus G" to the elastic shear modulus G', these modulus values being measured in accordance with the standard ASTM D 5992-96, at a frequency of 10 Hz for a temperature of 100°C, and any electrically conducting elastomer compound being defined as having an electrical resistivity less than or equal to 1E+06 Ohm centimetres ('Ω.cm), measured in accordance with the standard ASTM-D257; - a tread having two axial end portions or tread wings (27, 28) that are axially separated by a central tread portion; - a crown reinforcement, radially on the inside of the tread, comprising at least one protective reinforcement and a working reinforcement, said reinforcements being formed respectively of protective layers (311, 212) and of working layers (321, 322) containing metal reinforcers coated with an elastomer compound, these layers at their axial ends having a layer of edging compound (35, 37); - a carcass reinforcement, radially on the inside of the crown reinforcement, comprising at least one carcass layer made up of metal reinforcers coated in an electrically conducting coating elastomer compound, said metal reinforcers being substantially mutually parallel and forming, with the circumferential direction (XX') an angle of between 85° and 95°, each carcass layer comprising a main part, connecting two beads to one another and wrapped, within each bead, around a bead wire to form a turn-up; - a carcass-crown coupling layer consisting of electrically conducting elastomer compound and inserted between the carcass reinforcement and the crown reinforcement, axially towards the outside in the shoulder region; - two sidewalls connecting the tread wings (27, 28) to the two beads, said beads comprising a bead chafer layer intended to come into contact with a rim;